Knox information on the site is deemed reliable, but not guaranteed. Our Knox stats, Knox census, and Knox information is aggregated from many different sources and may be dated. Currently, we have forty-two Knox foreclosures of twenty-three thousand seven hundred seventeen Knox, Illinois housing units housing units, of which twenty-two thousand fifty-six are occupied, fifteen thousand seven hundred eighty-five are owner occupied, six thousand two hundred seventy-one are rented, one thousand six hundred sixty-one are vacant, and seven thousand eight hundred sixty-four have mortgages. has twenty-two thousand fifty-six households, and fifty-five thousand eight hundred thirty-six citizens.